Snoop is a chick who played a hitman in season four.
Her story is particularly interesting because she's not an actress, she really is a gangster from B'more. She did time for second degree murder. After being released, the actor who plays Omar (greatest character ever) met her at a bar and invited her onto the set. Show creator David Simon loved her whole image so much that he created a part for her. It really turned her life around so it's a shame to see she slipped back into crime.